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Search Results: 1 - 10 of 548 matches for " ?oli? Slavica "
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Morphological and pomological traits variability of almond genotypes from Slankamen hill population
oliSlavica,Zec Gordan
Genetika , 2007, DOI: 10.2298/gensr0703291c
Abstract: Almond production in Serbia is much lower then needs and possibilities and its growing are limited on garden plots. Short period of biological rest is characteristic of almond tree. Because of that its growth can be successful only in some locations in Serbia. One of such places is Slankamen hill, where almost every garden plot has almond seedlings. Spontaneous almond population from Slankamen hill has great variability of morphological and pomological traits. After several years of visiting this location and evaluating of more than 300 almond seedlings, 20 genotypes with good and regular cropping have been selected. During the 2003-06, their morphological and pomological traits were examined. Description was given on the basis of almond descriptor (GüLCAN, 1985). The research, selection and collection of almond genotypes from this locality should contribute expansion of almond tree growing area in Serbia. Genotypes 1 and 19 with medium fruit and regular crop, as well as the late-blooming genotypes 29 and 13 were selected.
The effects of the parents’ genotype on susceptibility to leaf curl (Taphrina deformans (Berk.) Tul) of vineyard peach hybrid seedlings
Zec Gordan,oliSlavica,Jankovi? Zoran,?urovi? Sne?ana
Genetika , 2007, DOI: 10.2298/gensr0701047z
Abstract: Leaf curl is one of the peach diseases with the most economically important impact, because very strong infection can cause total defoliation. Susceptibility to a leaf curl was examined from the period 1994-1998 in a collection of selected vineyard peach genotypes and newly peach and nectarine cultivars. Selected low susceptible genotypes (vineyard peach GR/65/87 and processing peach Villa Ada) were used in cross-pollination with differently susceptible genotypes. The process produced more than 250 seedlings of F1 progeny from few combinations of the parents. Susceptibility of hybrid seedlings to the leaf curl pathogen was investigated several years in the open field, without application of pesticide. More types of inheritance of examined characteristic were determinate in the progenies from different combinations of the parents. The results agree with polygenic inheritance. .
Genetic and phenotypic variability of cherry plum (Prunus cerasifera Ehrh) pomological characteristics
oliSlavica,Zec Gordan,Marinkovi? Dejan,Jankovi? Zoran 1
Genetika , 2003, DOI: 10.2298/gensr0303155c
Abstract: Cherry plum (Prunus cerasifera Ehrh) is one of the most widely spread fruit species in our country. The fruits are mostly used for brandy production and the seed is used for rootstock production in fruit culture. As cherry plum is resistant to plant diseases and pests, chemical protection is not required. Concerning that, cherry plum is reach and cheap source for the production of healthy food. The objective of this research was the analysis of genetic and phenotypic variability, as well as study on correlation of pomological traits of 49 cherry plum genotypes selected from the native population in Serbia. It was measured mat the highest genetic variance in total phenotypic variance was for the fruit height and total sugar content. The lowest genetic variance in total phenotypic variance was for the length of the stalk and dry matter content. The highest genetic variance coefficient (CVg = 22.93%) was calculated for the total acid content although the lowest value of genetic and phenotypic variance was for the fruit width (CVg = 0.69%; CVf = 0.80%). The highest coefficient of phenotypic and genetic correlation was calculated between the weight and height of the fruit. Native population of cherry plum in Serbia and Montenegro is specific because of the extensive variability of the forms which is highly important for the selection of raw material in breeding process.
Dehydrogenase isoenzyme polymorphism in genus Prunus, subgenus Cerasus
oliSlavica,Rakonjac Vera,Fotiri?-Ak?i? Milica,Nikoli? Dragan
Genetika , 2012, DOI: 10.2298/gensr1203619c
Abstract: Dehydrogenase polymorphism was studied in 36 sour cherry (Prunus cerasus L.), sweet cherry (Prunus avuim L.), mahaleb (Prunus mahaleb L.), ground cherry (Prunus fruticosa Pall.), duke cherry (Prunus gondounii Redh.), Japanese flowering cherry (Prunus serrulata Lindl.) and four iterspecific hybrids (standard cherry rootstocks ‘Gisela 5’, ‘Gisela 6’, ‘Max Ma’ and ‘Colt’). Inner bark of one-year-old shoots, in dormant stage, was used for enzyme extraction. Vertical PAGE was used for isoenzyme analysis: alcohol dehydrogenase (ADH), formate dehydrogenase (FDH), glutamate dehydrogenase (GDH), isocitrate dehydrogenaze (IDH), malate dehydrogenase (MDH), phosphogluconate dehydrogenase (PGD), and shikimate dehydrogenase (SDH). All studied systems were polymorphic at 10 loci: Adh -1 (3 genotypes) and Adh-2 (5 genotypes), Fdh-1 (2 genotypes), Gdh-1 (3 genotypes), Idh-1 (4 genotypes) i Idh -2 (5 genotypes), Mdh-1 (3 genotypes), Pgd-1 (4 genotypes), Sdh-1 (1 genotype) i Sdh-2 (3 genotypes). Cluster analysis was used to construct dendrogram on which four groups of similar genotypes were separated. Obtained results indicate that studied enzyme systems can be used for determination of genus Prunus, subgenus Cerasus. Among studied enzyme systems ADH, IDH and SDH were the most polymorphic and most useful to identify genetic variability. Polymorphism of FDH and GDH in genus Prunus, subgenus Cerasus was described first time in this work. First results for dehydrogenase variability of Obla inska indicate that polymorphism of loci Idh-2 and Sdh-2 can be useful for discrimination of different clones.
Variability of vineyard peach tree characteristics
Zec Gordan,oliSlavica,Marinkovi? Dejan,Nikoli? Dragan
Genetika , 2008, DOI: 10.2298/gensr0801001z
Abstract: Vineyard peach seedlings are the most important rootstock for peach in Serbia and abroad. High variability is a characteristic of the vineyard peach planting material that is used as rootstock in nursery production. Through work of many years, vineyard peach genotypes with qualitative traits were selected and collected. Seedlings that are progeny of the nine selected genotypes and resulted from self and open pollination were examined. The vineyard peach seedlings resulted from uncontrolled pollination and with different geographical origin served as reference. A goal of research was to get vineyard peach genotypes that would give more uniform generative progeny with qualitative traits. This paper presents the results of two-year research of morphological traits of more than 500 vineyard seedlings. Based on the results, positive genotypes were selected for further inbreeding. Further, the seedlings of the selection 6 have the lowest coefficients of variation for trunk thickness, tree height and number of branches, which points to the self-pollination as a good method for getting more uniform progeny. .
Five-Dimensional Space-Times with a Variable Gravitational and Cosmological Constant
Sanjay Oli
Journal of Gravity , 2014, DOI: 10.1155/2014/874739
Abstract: We have presented cosmological models in five-dimensional Kaluza-Klein space-time with a variable gravitational constant ( ) and cosmological constant ( ). We have investigated Einstein’s field equations for five-dimensional Kaluza-Klein space-time in the presence of perfect fluid with time dependent and . A variety of solutions have been found in which increases and decreases with time , which matches with current observation. The properties of fluid and kinematical parameters have been discussed in detail. 1. Introduction The observational analysis of High-Redshift Type Ia Supernova and Supernova Cosmological Project [1–5] provided a wealth of information about our universe. These observational analyses imply that a positive cosmological constant of order ( ) may dominate the total energy density in the universe and that the expansion of the universe is accelerating [6]. Higher-dimensional cosmological models play a vital role in many aspects of early stage of cosmological problems, one of the frontier areas of research to unify gravity with other forces in nature. The study of higher-dimensional space-time provides an idea that our universe was much smaller at early stage of evolution than observed today. The detection of extra dimensions in current experiments is beyond those four dimensions observed so far. Over the past few years, a lot of attention was received on cosmological models in which space-time has more than five dimensions. The field of cosmology has been highly enriched by the Kaluza-Klein theory [7, 8], in which they have shown that gravitation and electromagnetism could be unified in a single geometrical structure. Chodos and Detweiler obtained a higher-dimensional cosmological model in which an extra dimension contracts and indicates that this contraction of extra dimension is a consequence of cosmological evolution [9]. Guth and Alvarez and Gavela noticed that during contraction process extra dimensions produce massive amount of entropy, which provides an alternative resolution to the flatness and horizon problems as compared to the usual inflationary scenario [10, 11]. A number of authors [12–22] obtained the solutions of Einstein’s field equations for higher-dimensional space-times containing a variety of matter fields. In their analysis, some authors have shown that there is an expansion of the four-dimensional space-times while the fifth dimension contracts or remains constant. The concept of a variable gravitational constant was first proposed by Dirac in 1937 [23]. In 1985, Lau proposed modifications linking the variation of
Investment Climate and Foreign Direct Investment Trends in the South Caucasus and Central Asia
Slavica Penev
South East European Journal of Economics and Business , 2007, DOI: 10.2478/v10033-007-0013-1
Abstract: This paper analyzes and compares investment climates and trends in the South Caucasus and Central Asia. The analyses and comparisons were conducted in view of the impacts of transitional progress, economic development, and the energy reserves from these regions on the inflow of foreign direct investment. Improvement of the investment climate by accelerating the transition process and reducing investment risks can be seen as the most important determinants of FDI inflows into the countries of these two regions. Structural diversification of South Caucasian and Central Asian natural resource-based economies would be essential in ending dependence on the energy and mining sectors and would have positive long-term effects on economic growth and the investment climate, and attract other, additional types of FDI.
An Approach in Development of System for Production Scheduling
Slavica Cvetkovi
Acta Mechanica Slovaca , 2009, DOI: 10.2478/v10147-010-0042-0
Abstract: This paper presents a system for production scheduling which is a part of production planning system. Production scheduling according to delivery time is specially considered and launch plans for parts are determined according to structural components. Using system of different applications and report types, developed program gives support for business decision making which considers production planning and scheduling.
The development of the system for termining the pro-duction of wooden chairs
Cvetkovi? Slavica
Glasnik ?umarskog Fakulteta , 2010, DOI: 10.2298/gsf100118002c
Abstract: This paper establishes the system for termining the production of wooden chairs which is the consisting part of the system for production planning. It particularly discusses the termination of the production according to the structural components of the product in thermic units. It defines the simulation programme for the solution of the problem, which is projected in the way that it provides a continuous realization of the logistic chain from the moment of the purchase of repromaterial, through the realization of the working errand in the workshop, to the delivery of the product to the buyer. The simulation experiment starts with the assumption that the necessary repromaterial is opportunely accessible in the entrance storehouse. The programme, which is managed by the automatically calculated priorities of the working errands, completely describes what happens in the workshop.
Dominant perceptions on the age
Komatina Slavica
Stanovni?tvo , 2003, DOI: 10.2298/stnv0304147k
Abstract: Contemporary developed society, despite the fact that it is constantly and intensively ageing, is characterized by deeply rooted numerous negative stereotypes on old people and old age as a life period. The study of dominant perceptions on the age of Belgrade population takes not only the universal character of negative connotation of old age into consideration, but also the concrete unfavorable social context. The delicate problematic of stereotypes on old age and old people has been analyzed mostly indirectly, through questions on the beginning of old age, advantages and difficulties which we experience during ageing, the first subjective conscious encounter with one’s own ageing, the concept of ideal old age, changes in the persons traits and directly through questions on dominant negative perceptions which prevail on old people in our surrounding. Ageing in the Belgrade milieu is most commonly identified with illness and with the decline of physical potentials, and at the same time a number of other negative qualifications of old age as well. Research results indicate to a pronounced ambivalent standpoint towards ageing, to different observation of one’s own to old age of other people, to different consideration of old age among the sexes and to obvious aversion towards old people. This is expected, taking into consideration that living and ageing are developing nowadays under aggressive influence of contemporary mass culture which affirms youth, beauty, physical strength, health as dominant values, namely everything that is contrary to ageing and old age. On the other hand, our society is today confronted with, as well as in the near past, exceptional political, economic and cultural difficulties which cause specific problems with various age groups, as well as the lowering of the level of mutual endurance and tolerance. The atmosphere of straining the old people and emergence of new antagonisms causes the intensification of misunderstandings and distancing among generations as well and creates a favorable climate for maintaining different prejudices, even those towards ageing. While prejudices are by themselves a universal social-psychological category, prejudices on old age differ from the rest by one special and very significant characteristic - some primal fears are subconsciously hidden and some basic questions on the meaning of human existence are held back, so negative connotation of old age is precisely collective running away from these problems.
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